Relax primitive dependency warning in useDeepCompareEffect

[berkant37]

Description

useDeepCompareEffect currently shows a warning when all dependencies are primitive values.
This also affects the common case where there is only a single primitive dependency, where deep comparison is harmless and the warning becomes confusing.

This change relaxes the warning logic:

• Warns only when multiple primitive dependencies are used
• Does not warn when there is a single primitive dependency
• Existing behavior remains unchanged

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I performed a self-review of the code
• Tests added / updated where applicable
• All tests pass (npm test)

Related issue

Fixes #755